Basically with phosphate this bond is almost perfect"--but with the slightly larger arsenate
the bond is much harder to make.
is nearly indistinguishable from phosphate.
Rabinowitz and Leonid Kruglyak noted that GFAJ-1 does not replace phosphorus with arsenic throughout its DNA, but sometimes assimilates arsenate
in small amounts in the place of phosphate.
0] is the distribution constant in the absence of HA/FA, [lambda] is the distribution constant in the presence of HA/FA, logK is stability constant of arsenate
-HA/FA complex, x is number of moles of HA/FA that combine with 1 mole of arsenate
, and [HA] is concentration of HA/FA in moles per L.
Chromated copper arsenate
(CCA)--treated wood is no longer in use for residential applications in North America and has generally been replaced by copper amine preservative systems or micronized copper systems (Freeman and McIntyre 2008).
Relative bioavailability (RBA) was calculated as the ratio of the ABA for As in a specific soil-amended diet to the ABA for As in a diet containing sodium arsenate
(NRC 2003; U.
That's a problem because if something like a canister of DDT or lead arsenate
corrodes and leaks into the soil, it stays there for a very long time.
In particular, one subtle but critical piece of evidence has been overlooked, and it demonstrates that the DNA in question actually has a phosphate - not an arsenate
Arbuscular mycorrhizal fungi confer enhanced arsenate
resistance on Holcus lanatus.
The commercially practiced processes for chemical fixation of arsenic includes the precipitation of calcium arsenite or arsenate
, arsenic sulfide ([As.
The bacterium--identified by chance after the researchers had screened thousands of soil samples from old stock-dip sites--takes in a highly toxic form of arsenic (arsenite), and oxidises it to the much less dangerous and more easily immobilised arsenate
The International Agency for Research on Cancer recognizes arsenic and arsenic compounds as Group 1 Carcinogens, and the EU lists arsenic trioxide, arsenic pentoxide and arsenate
salts as Category 1 Carcinogens.